openai/gpt-5.3-chat → A (10:1)

Side A introduces a comprehensive multi-repository Git discovery system with deterministic snapshots, patch identity deduplication, replayable state, locking, and deep integration into emission and ranking logic, along with extensive new tests (including property/stateful tests). This is a major architectural addition. Side B is primarily a CLI restructuring and documentation update with limited backend impact. The scale, complexity, and system-wide implications of A far exceed B.